Papers, Addresses, Reports: Evolution of Sex in the Mollusca (Address of the Retiring President); The 1937 Flood in Southern Illinois; Extract From the Report of the Section Chairman (Agriculture); Evening Schools for Adult Farmers; The Art and...

Papers, Addresses, Reports: Geological Records of a Rhythmic Nature (Address of the Retiring President); Our Exhaustible Resources of Minerals - What Should Be the Aims of a Conservation Program?; Advances in the Natural Renewable Resources...

Papers, Addresses, Reports: Recent Developments in the Chemistry of the Rare Earth Group (Address of the Retiring President); The Significance of the Conservation of Land Resources; Classification of Illinois Lands; Soil Erosion Control...

Papers, Symposia, Addresses, Reports: Report of Secretary; Report of Treasurer; Report of Committee on Ecological Survey of State; Address of Welcome; Life and Work of John Ulric Nef; Stellar Photometry; The Determination of Stellar Distances;...

Papers, Addresses, Reports: Treasurer's Report; Production of Bound by the Application of Heat; Research in Applied Acoustics at the Wallace Clement Sabine Laboratory; The Atom of the Chemist; Stellar Evolution; Selecting and Encouraging...